On the Edge of Earth: 5000 is a sci-fi adventure game by Roope Tamminen, originally developed for the Ludum Dare 48 game jam under the theme of "Connected Worlds". In it, you play as an astronaut attempting to terraform a world, using a whole bunch of sciencey stuff he doesn't quite remember how to use. While enjoyment will on the player's tolerance for tinkering, On the Edge of Earth: 5000 is a charming experience that rewards experimentation.